Buggy code:
@ Controller @ RequestMapping ( { "//hooks//github" , "" } ) public class GithubHookController { private static final Logger LOGGER = Logger . getLogger ( StackExchangeChatBot . class . getSimpleName ( ) ) ; private static final int MAX_NUMBER_NON_DISTINCT_COMMITS_PER_LINE = 2 ; @ Autowired private ChatBot chatBot ; @ Autowired private Statistics statistics ; @ Autowired private GithubBean githubBean ; private RuntimeLogService runtimeLog ; private final Map < Class < ? extends AbstractEvent > , BiConsumer < WebhookParameters , AbstractEvent > > map ; public GithubHookController ( ) { } public void post ( WebhookParameters params , AbstractEvent event ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=ping" ) @ ResponseBody public void ping ( final WebhookParameters params , @ RequestBody final PingEvent pingEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=commit_comment" ) @ ResponseBody public void commitComment ( final WebhookParameters params , @ RequestBody final CommitCommentEvent commitCommentEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=create" ) @ ResponseBody public void create ( final WebhookParameters params , @ RequestBody final CreateEvent createEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=delete" ) @ ResponseBody public void delete ( final WebhookParameters params , @ RequestBody final DeleteEvent deleteEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=fork" ) @ ResponseBody public void fork ( final WebhookParameters params , @ RequestBody final ForkEvent forkEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=gollum" ) @ ResponseBody public void gollum ( final WebhookParameters params , @ RequestBody final GollumEvent gollumEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=issues" ) @ ResponseBody public void issues ( final WebhookParameters params , @ RequestBody final IssuesEvent issuesEvent ) { if ( ( ( issuesEvent . getAction ( ) . equals ( "opened" ) ) && ( ( issuesEvent . getIssue ( ) . getBody ( ) ) != null ) ) && ( ! ( issuesEvent . getIssue ( ) . getBody ( ) . isEmpty ( ) ) ) ) { <START_BUG> chatBot . postMessages ( params , githubBean . stringify ( issuesEvent ) , issuesEvent . getIssue ( ) . getBody ( ) ) ; <END_BUG> } else { chatBot . postMessages ( params , githubBean . stringify ( issuesEvent ) ) ; } if ( issuesEvent . isOpened ( ) ) { statistics . add ( issuesEvent , true ) ; } if ( issuesEvent . isClosed ( ) ) { statistics . add ( issuesEvent , false ) ; } } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=issue_comment" ) @ ResponseBody public void issueComment ( final WebhookParameters params , @ RequestBody final IssueCommentEvent issueCommentEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=member" ) @ ResponseBody public void member ( final WebhookParameters params , @ RequestBody final MemberEvent memberEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=pull_request" ) @ ResponseBody public void pullRequest ( final WebhookParameters params , @ RequestBody final PullRequestEvent pullRequestEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=pull_request_review_comment" ) @ ResponseBody public void pullRequestReviewComment ( final WebhookParameters params , @ RequestBody final PullRequestReviewCommentEvent pullRequestReviewCommentEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=push" ) @ ResponseBody public void push ( final WebhookParameters params , @ RequestBody final PushEvent pushEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=watch" ) @ ResponseBody public void watch ( final WebhookParameters params , @ RequestBody final WatchEvent watchEvent ) { } @ RequestMapping ( value = { "//payload" , "//hook" } , method = RequestMethod . POST , headers = "X-Github-Event=team_add" ) @ ResponseBody public void teamAdd ( final WebhookParameters params , @ RequestBody final TeamAddEvent teamAddEvent ) { } @ ExceptionHandler ( Exception . class ) @ ResponseStatus ( HttpStatus . BAD_REQUEST ) public void handleException ( final Exception ex , final HttpServletRequest request ) { } private static < T > List < List < T > > split ( int size , List < T > data ) { } }

Fix:
chatBot . postMessages ( params , githubBean . stringify ( issuesEvent ) , ( "><seq2seq4repair_space>" + ( issuesEvent . getIssue ( ) . getBody ( ) ) ) ) ;